chore: fix some comments

Signed-off-by: haouvw <jchaodaohang@foxmail.com>

tests/README.md

@@ -104,7 +104,7 @@ ctest
 
 To run the same tests on a release build, replace `debug` with `release`.
 
-To run specific hash test, you can use `ctest` `-R` parameter. For exmaple to run only `blake2b` hash tests:
+To run specific hash test, you can use `ctest` `-R` parameter. For example to run only `blake2b` hash tests:
 
 ```
 ctest -R hash-blake2b

tests/unit_tests/hardfork.cpp

@@ -375,7 +375,7 @@ TEST(voting, threshold)
       db.add_block(mkblock(hf, h, v), 0, 0, 0, 0, 0, crypto::hash());
       bool ret = hf.add(db.get_block_from_height(h), h);
       if (h >= 8 && threshold == 87) {
-        // for threshold 87, we reach the treshold at height 7, so from height 8, hard fork to version 2, but 8 tries to add 1
+        // for threshold 87, we reach the threshold at height 7, so from height 8, hard fork to version 2, but 8 tries to add 1
         ASSERT_FALSE(ret);
       }
       else {

tests/unit_tests/logging.cpp

@@ -166,7 +166,7 @@ TEST(logging, glob_prefix)
 TEST(logging, last_precedence)
 {
   init();
-  mlog_set_categories("gobal:FATAL,glo*:DEBUG");
+  mlog_set_categories("global:FATAL,glo*:DEBUG");
   log();
   std::string str;
   ASSERT_TRUE(load_log_to_string(log_filename, str));

tests/unit_tests/output_selection.cpp

@@ -236,7 +236,7 @@ TEST(select_outputs, exact_unlock_block)
   const uint64_t exact_block_offsets_stop_exclusive = *(first_block_too_young - 1);
 
   // if too low we may fail by not picking exact block
-  // if too high test is not as senstive as it could be
+  // if too high test is not as sensitive as it could be
   constexpr size_t NUM_PICK_TESTS = 1 << 20;
 
   bool picked_exact_unlock_block = false;